不同品种膜下滴灌棉花水氮效应对其产量的影响

目的]研究不同水、氮用量对不同棉花品种籽棉产量的影响及其差异.方法]采用三因素完全随机区组设计,三因素指品种(V)、氮(N)和水(W).结果]随着氮肥用量和灌水量的增加,2个棉花品种籽棉产量均显著增加,但过大的灌水量会使产量有所下降,各处理中产量最大值出现在N2W2处理(N2:360 kg/hm2;W2:4 500 m3/hm2);品种间籽棉产量标杂A1显著高于新陆早33号,在低水低氮和高水低氮处理(N1W1、N1W3)2品种籽棉产量差异不显著,其他各处理品种间籽棉产量都达到显著差异水平.结论]针对不同棉花品种采用适宜的水肥调控措施,能够显著提高产量和水肥的利用效率.

Effects of Water and Nitrogen Coupling on the Yield of Different Varieties Cotton under Film Drip Irrigation

The field experiment was conducted to research the effects and differences of different quantity of water and nitrogen application on cotton yield in two cotton varieties.The results show that the yields of two cotton varieties were increased significantly with the increase of water and nitrogen,but reduced with excessive irrigation water,the maximum cotton yield were obtained with treatment N2W2(N2:360kg/hm2;W2:4500 m3/hm2).The cotton yield of Biaoza A1 is significantly higher than that of Xinluzao33,there was no significant difference between in treatment N1W1 and N1W3,other treatments showed ignificant difference in cotton yield between the two varieties.These results suggested that the yield and water and fertilizer use efficiency can be enhanced evidently by adopting suitable measures of water and fertilize application based on different cotton varieties.